SH7727 Datasheet, PDF (777/1109 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7700 Series

23.6.2 Cable Disconnection
USB function
Cable connection state
VBUS pin = 1
Section 23 USB Function Controller
Application
Disconnect USB cable
USBF_VBUS pin = 0
(USBIFR/VBUSMN = 0)
USBIFR1/VBUSF = 1
Interrupt request
USB bus connection interrupt
Clear VBUSF flag
(USBIFR/VBUSF)
Reset UDC core
End
Figure 23.3 Cable Disconnection Operation
The above flowchart shows the operation in cable disconnection. When a USB bus connection
interrupt occurs, disconnection can be detected by confirming the status of the USBF_VBUS pin.
Rev. 5.00 Dec 12, 2005 page 705 of 1034
REJ09B0254-0500